/*****************************************************************************

Copyright (c) 1998, 2009, Innobase Oy. All Rights Reserved.

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; version 2 of the License.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 
51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

*****************************************************************************/

/**************************************************//**
@file include/eval0proc.h
Executes SQL stored procedures and their control structures

Created 1/20/1998 Heikki Tuuri
*******************************************************/

#ifndef eval0proc_h
#define eval0proc_h

#include "univ.i"
#include "que0types.h"
#include "pars0sym.h"
#include "pars0pars.h"

/**********************************************************************//**
Performs an execution step of a procedure node.
@return	query thread to run next or NULL */
UNIV_INLINE
que_thr_t*
proc_step(
/*======*/
	que_thr_t*	thr);	/*!< in: query thread */
/**********************************************************************//**
Performs an execution step of an if-statement node.
@return	query thread to run next or NULL */
UNIV_INTERN
que_thr_t*
if_step(
/*====*/
	que_thr_t*	thr);	/*!< in: query thread */
/**********************************************************************//**
Performs an execution step of a while-statement node.
@return	query thread to run next or NULL */
UNIV_INTERN
que_thr_t*
while_step(
/*=======*/
	que_thr_t*	thr);	/*!< in: query thread */
/**********************************************************************//**
Performs an execution step of a for-loop node.
@return	query thread to run next or NULL */
UNIV_INTERN
que_thr_t*
for_step(
/*=====*/
	que_thr_t*	thr);	/*!< in: query thread */
/**********************************************************************//**
Performs an execution step of an assignment statement node.
@return	query thread to run next or NULL */
UNIV_INTERN
que_thr_t*
assign_step(
/*========*/
	que_thr_t*	thr);	/*!< in: query thread */
/**********************************************************************//**
Performs an execution step of a procedure call node.
@return	query thread to run next or NULL */
UNIV_INLINE
que_thr_t*
proc_eval_step(
/*===========*/
	que_thr_t*	thr);	/*!< in: query thread */
/**********************************************************************//**
Performs an execution step of an exit statement node.
@return	query thread to run next or NULL */
UNIV_INTERN
que_thr_t*
exit_step(
/*======*/
	que_thr_t*	thr);	/*!< in: query thread */
/**********************************************************************//**
Performs an execution step of a return-statement node.
@return	query thread to run next or NULL */
UNIV_INTERN
que_thr_t*
return_step(
/*========*/
	que_thr_t*	thr);	/*!< in: query thread */


#ifndef UNIV_NONINL
#include "eval0proc.ic"
#endif

#endif
